Clock



FIG. 1 is a front view of a clock according to this invention;

FIG. 2 is a rear view of a clock according to this invention;

FIG. 3 is a top view of a clock according to this invention;

FIG. 4 is a bottom view of a clock according to this invention;

FIG. 5 is a right side view of a clock according to this invention; and,

FIG. 6 is a left side view of a clock according to this invention.

The ornamental design for a clock, as shown and described.